Mechanical clutch.



RA. KEMP L E. G. REEDER.

MECHANICAL CLUTCH. APPLICATION FILED 1113,17, 1914.

1,125,555., Patented Jan.19,1915.

2 SHEETS-SHEET 1,.

P.. A KEMP @E Le'. REBDBR. 1

MECHANICAL CLUTCH. APPLICATION FILED PEB,17,1914,

Patented. Jan. 19, 1915.

2 SHEETS-SHEET 21 @NXT STllES recrear onirica.

FRED e. KEMP, or New YORK, n. Y., AND

EDWIN C. REEDER, F CHICAGO. ILLXNOIS,

ASSIGNOB/S TO LIDGERWDOD MANUFACTURING COMPANY, OF NEW YORK, N. Y., A.

CORPORATION 0F NEW YORK.

MECHANICAL CLUTCH.

Speccaton of Letters Patent.

Patented Jan. 19, 1191.5.

Application filed February 17, 1914. Serial No. 819,162.

To all 'uf-honi may 60m-cwi.

Y Be it known that we, FRED A. KEMP, a subject of the Czar of Russia,residing at New York city, inthe county of New York and State of NewlYork, and EDWIN Rennen, a citizen of the United States, re-

siding at Chicago, in the county of Cook and State of -Illinois, haveinvented certain new and useful Improvements in Mechanical Clutches, ofwhich the following is a..

specification.

Our invention relates to new and useful .improvements in mechanicalclutches, and 'more particularly to clutches of the type which consistofa double-faced member and opposed-clutch elements adapted to engage saidmember to clutch said elements and member together.-

The invention consists in the improvew ments to he more fully describedhereinafter and the novelty of which will be particularly pointed outand distinctly claimed. lvl/Ye have fully and clearly illustrated our.invention in the accompanying drawings to be taken as a part of thisspecilication,'and

wherein:

Figure l is a view in front elevation of one embodiment of ourinvention, parts bel ing broken away land others being shown in section.Fig. 2 is a. transverse central sec tion taken through the embodimentshown in Fig. l. Fig. 3 is a perspective view of one of the clutchelements. Fig. 4 is a perspective view of the double-faced member. Fig.5 is a detail view partly in section of a locking device employed.

. Referring to the drawings by characters .of reference, 1 designates ashaft upon A which the driving and driven elements of 40 the clutch aremounted. Arranged to rotate on the shaft 1 is a sleeve 2 which may carrya gear 3 adapted to form part of a train of gearing to transmit motionto any mechanism which it is desiredvto drive. At one end the sleeve 2carries a clutch member, `ln'eferabiy in the form of a disk 4, which iscircular in general contour and is arranged in a. plane substantially atright-.angles to the aXis of rotation of the shaft 1. The disk 4 isprovided with an annular, laterally-pr0jecting, circumferential flangeor rim 5 which, in the present embodiment, carries a double-facedfriction member, and incloses the oppositely operating clutch deviceswhich are' adapted to engage said doi'ible-faced element, all of whichwill be presently described. 'At its inner face the flange or rim 5 iscored out to provide a counterbore G which terminates adjacent the innerface of the disk 4, thereby forming a shoulder' 7 and formed on theinner face of the rim, extending lengthwise of the shaft and parallel toeach other are ribs 7 having longitudinal grooves 7l for a purpose to bepresei'itly set forth. Arranged within the flange or rim 5 is adouble-faced clutch member S consisting preferably of an annular radialmember 9 lying in a plane at right-angles to the vairis of rotation ofthe shaft l, from which member 9 extend in opposite directions, on eachside thereof. oppositely-inclined clutch flanges l0 which v iareoutwardly from the said annular meinber 9, thus forming on bothsicles ofthe member 9 annular clutch faces which are substantially cone-shaped incross section, as clearly shown in Figs. 2 and The .inner edge of thedouble-faced clutch member engages the shoulder 7 in the flange 5, andis provided with external webs or ribs 81-, which engage with the ribs7a, said ribs S having longitudinal grooves Sb alining with the groovesin the ribs 7a. The member 8 is clamped against said shoulder 7, andthereby locked in position within the fiange 5, by means of a clampingring ll. 'which engages the outer end of said double-faced `clutchmember, said ring being held in clamping engagement with said clutchinember 8 by means of tie or ciamping bolts l2 passing through apertures13 in the head 4, and through the passages formed by the alining grooves7b, 8b, each of said bolts having at one end a head ,llt engaging thesaid disk il, and at its opposite end a clamping nut l5 which engagessaid ring` ll. to cause the same to clamp the double-faced clutch memberagainst said shoulder 7.

Mounted on the shaft l between a shoulder i6 thereon and aninwardly-projecting hub portieri l? of the sleeve 2. is a coupling-huhi8. which is keyed to the shaft l, as at 19. so as to turn therewith.This couplinar hub is preferably cylindrical in shape, and mount edthereon and slidable lengthwise thereof is one of the clutch elementsadapted to cooperate with one of tlie clutch-facesy formed by theflanges 10 on the member 9,heretofore describedf This clutch elementlpreferably includesy a sleeve 20 arranged concentric With the hub 18 andthe shaft 1, and slidable thereon lengthwise of said shaft, and carryingat its outer end, or that end opposite to the disk i, anoutwardly-projecting circumferential flange 21, preferably lying in aplane at right angles to the axis of rotation, the outer edge of whichflange 21 preferably closely approaches the inner surface of theclamping ring 11, heretofore described, as' clearly shown in Fig. 2.Mounted-upon the linner face of the flange 21 is'an annular series oflfriction blocks 22,`or a-continuous annular friction element, as may bedesired, having its outer edge faces inclined, as at 23, to engage thefaces 10,.heretofore described, to clutch the element21 to the mem ber 9`and disk i. rlhe sleeve 20, just described, is keyed to the hub 18,asat 24, so asy to rotate therewith. Surrounding the Sleeve 20, andslidable lengthwise thereof, is a second clutch element adapted tocoperate with the inner face of the element 9, said last-mentionedclutch element preferably including a sleeve 25 keyed to the sleeve 20,

as'at 26, and carrying at its inner end anannular circumferential flange27, carrying on its inner face an annular series of friction blocks, ora continuous friction ring, as

may be desired, as shown at 28, having oppositely-disposed inclinedfaces 29 adapted to cooperate with ,the inclined faces 10, heretoforedescribed, on the'opposite side of the member 8. from the frictions 22,When the parts are clutched together. The friction blocks or rings maybe secured to the elements 21 and 27 inan suitable manner, as byfastening bolts 29.

VVeWillnow proceed to describe the means formoving-the elements 21 and27 toward and away from each other toclutch the same with, and unclutchthem from, the element'9. Mounted on the outer face of the elementv 21are pairs of parallel ears 30, there preferably beingA live pairs oisuch' ears, as will be understood from an examination of Fig. 1 of thedrawings. Fulcrumed infeaeh pair of ears, at a point intermediate itsends, is' a bell-crank lever 31, one arm of each of said leversextending in a general direction longitudinally of the shaft and awayfrom the element 21, and having connected to its free outer end aconnecting link 32, as at 33,` the opposite end 'of saidl link beingpivoted, as

vat 34, to an operating sleeve 35 splined to the shaft 1, as at'36, toturn with said shaftv and move longitudinally of the same asshown inFig. 2. The inner free ends 31 'of the bellscrank lefver are each formedwith a cam face 37 adapted to coperate with a head 38 on a thrust belt'39' ext-ending 6 5 throughl alining recesses 40 respectively in masser;

the friction blocks 29 into engagement with i the cone friction faces1.0 on that side of the member S. By this same operation the-reaction offorces on the flange 21 will move the latter toward said element 9 to;throw the friction blocks 22 intoy engagement with the cone frictionsurfaces` 10' on the other side of the element 9 from the blocks 29. It

will thus be seen that movement of the sleeve 35 in one direction servesto move both sets of friction elements into contact with the oppositefaces of the member 9, and that movement of the sleeve 35 inthe.opposite. direction will relieve thepressure of the disks 21 and 27 onthe clutch element 9, thereby tending to unclutcvhv'the parts and permitthe clutch elements to run free from said element 9.

In order to insuresimultaneous. disengagement of the friction elementslfrom the element 9, and positive movement of the vsame out'of Contactwith said element, and

to maintain them parallel during such movement, we provide means forpositively moving said friction elements apart when the sleeve 35 ismoved to relieve the fric- 'l tional Contact, which means I Will newdescribe..A

At itsA inner end, or that end nearer the disk 4, the Sleeve 29 isprovided with an inwardly-extending circumferential flange having ears42, into which are threaded, as at 43, the ends' of thrust rods or bolts114, which pass through grooves i5 extending lengthwise of the hub 18,and the free end of which rods project beyond the outer end of thesleeve 20 into position to be engaged by the faces 46 on the bellcrankcam levers 31, which facesare on the oppositesides of the parts 31a fromthe faces-37, the arrangement being such that, when the sleeve 35 ismoved toward -the clutch hub to relieve the friction, said faces 116of'the cam levers will respectivelyl engage the ends'l of the bars orbolts 4eito positively thrust the same lengthwise of the shaft andvclutch 4hub toward the disk i, and thereby move the element 27 to cairryits friction blocks out of contact with thecone clutch facesof theelement 9.' The bars' 44, by virtue of their threadedA connections withthe ears #12, may be adi usted as to length so as to regulate thedistance to which the element 27 is moved laway from the element 9 bythe levers 31. The outer projecting ends of the rods may be squared, incrosssection, -so that las vso

nearer to theouter end face of the hub 18 than that plane occupied bythe end faces of saidbars 44 so that, when vthe faces 46 of thev camlevers are moved into engagement with the outer ends of said bars 44,said bars will first be moved as above set forth, and said levers willthen be lmoved intoengagement with the faces 48 on said thrust bolts.and the force of said levers therefore Will be exerted, not only to pushthe. element 27 away fromy the element 9, but also to pull the element21 away Afrom said element 9 through. reaction .of the forces exerted onthe heads of the thrust bolts and said element 21.

The thrust belts 47 are adjustable in their threaded sockets so as todetermine the distance the .oppositely-disposed clutch ele,

ments 21 and 27 Will be moved when being disengaged from thedouble-faced clutch member 9, and are preferably provided With squaredshanks 47a for a purpose to be set forth,'and the heads' 48 are alsopolysided to be engaged by a. Wrench or other tool.

- ln order to maintain the bolts 44 and the said bolts.

thrust bolts 47 in adjusted position, so that tbe extent movement of theclutch elements 21 and 27 will be maintained constant, We providelocking devices, each of which cooperates with one of the bolts 44 andthe adjacent thrust bolt to prevent turning of rlhis locking device maytake a number of forms'within the scope of our invention, but We preferto make it in the. form of a locking plate 4.9 having a longitudinalslot 50, and ar end recess 51 shaped to conform to the polysided head ofthe bolt 44, to cooperate with said head to prevent turning thereof, thelocking plate being heldin place by a bolt 52 passed through the slotand threaded into the coupling hub 18. The plate 49 is of suchdtnensions and is so arranged that a side ffce 53 thereof will Contactthe squared shank, of the thrust bolt 47a and thereby locky the sameagainst turningr as appears clearly from Fig. 5. 1t veilt be understoodthat there is one of these locking plates for each of the vrods 44 andthe adjacent bolt 47. `When ad..-

/V Ijiustment vis necessary, the rods 44 and bolts '47 may be releasedfor this purpose, by

loosening the fastening bolts 5Q'and moving the plates 49 toward theaxis of rotation to release the bolts 44' and the thrust bolts 47. Thehead 88 on the outer end of each of the pull boltsor devices 39 is madeadjustable, the adiustment of the sai'dheads being are clutchedtogether.

provided in order to regulate the throvir of the clutch elements 21 and27 toward the h double-faced clutchelement 9 when the friction is beingapplied. These heads preferably each consist ofk a sleeve 54 looselymounted upon the outer end of the bolt 89 and provided on opposite.sides of the bolt with fulcrum points 55 adapted to be ento receivebetweenthem the arm'la of the cam lever, the arrangement being such thatthe sleeve is always held in position to have the fulcrum points 55properly engaged by the face 37 of the cam lever. The movement of thesleeves 56 -is limited in a direction toward the hub 18 by the portion31a of the cam lever, and in the opposite direction by means of collarsor nuts 57, which 'may be fixed on the end of the bolt by 'any suitablemeans, as by being threaded thereon, as shown.

"We believe the operation of the preferred embodiment of the inventionabove described 'Will be clear, but We briefly de- 4scribe suchoperation as follows: The parts.

drawings, and the heads 88 on the pull-bolts 39 are adjusted relative tothe operating levers so that when the latter are moved to set theclutch, the clutch elements 2l and 27 will be moved into engagementwithV the friction surfaces 10 of the clutch member 9 with the properdegree of friction to be' necessary to couple the parts. The thrust rods44 are also adjusted so that When engaged by thefaces 46 on theoperating levers the clutch element 27 will be moved away from thefriction surface 10, With which it coperates, a distance preferablyequal to that it is moved When the clutch is being set. The thrust bolts47 are also adjusted so that when the friction element v9.1 is moved outof engagement with its friction surface 10 its extent of movement willbe eeual to that it takes when the parts With Athe parts adjusted in themanner described. and in the position shown in Fig. Q, in which theparts are shown as clutched together, if it is dcsired to uncouple theparts the sleeve 85 is moved toward thev coupling hub 18, whichoperation will, serve to pull the outer arms of the bell-cranklevers 81in toward the axis of rotation, thereby relieving the thrust of saidlevers on the heads 38 of, the bolts 89. whereby friction connectionbetween the clutch elements 2.1 and 27 and the friction surfaces 19 isrelieved. Continued movement of the sleeve 35 tovvard the hub 18 willthen bring the surfaces 46 of the bell-crank levers into engagement withthe i it outer ends of the thrust rods 44 lwhich will serve topositively push .the friction e1ement 27 out of engagement with theclutch member 19, such movement-continuing until thesaid faces 46 on theoperating levers 4engage the heads ofthe bolts 47, when the reaction offorces between said bolts andv the element 21 exerted `by -said .leverswill serve 2to positively pull said element 21 out of enga ement withthe vfrictionsurface 10. By tie operation 'described the vclutch partsare disconnected and are free to rotate independently of each other.When it is 4desired to couple the clutch parts the Sleeve 35 is'movedaway from the coupling l Ahub 18, which operationrserves to bring thesurfaces 37 on said levers into engagement A.With the fulcrum points 55,and the force of the levers is exerted on the rods 39, and throughreaction on the element 21,.to.move the clutch element 27, and the ele-I lment 21, into engagement with thefriction 10. The arrangementdescribed not only provides a convenient Vand elicient ,means forcoupling `and uncoupling the partsfbut .insures simultaneous engagementof the .friction elements with 4the member v9, the

exert pull on said, devices to'move said elements into engagementwith-said double- '.faced member, and means independent of 1 lsaid y,pull'devicesadapted to beengaged by `said levers v to positiyely,separate said 'elements.

s 2 In a clutch, in combination, a doublefaced member, A a clutch hub,oppositely disposed clutch elements-adapted to engage the faces ofmember, said elements being carried by concentric sleeves .surrounding,said clutch hub, pull devices connected to onexof said elements, `andcam ,levers ful# crumed on the other ,of saidelements andvadaptedto'exert pullon said devices tomove said elements -into.engagement with said vdouble-faced member..

In a clutch, in combination, a doublefacedmember, a vclutch-hub,oppositely diS- posed clutchelements adapted to engage the faces of'saidmember, ysaid elements includ-v' ing concentric sleeves surrounding saidclutch hub, pull devices connected Ato one of said elements and passibetween said sleeves, and cam levers f crumed on the .ment, and. thrustdevices carried by other 'of said elements and adapted to exert pull onsaid devices to move said elements into engagement .with saiddouble-faced member. l

4. In a clutch, in combination, a doublefaced member, oppositelydisposed clutch velements adapted to engage the faces of said member,reaction'levers fulcrumed on one of Said elements, connections betweensaid le- Vers and the other of said elements to move the same into`engagement with said doublefaced member, and thrust means independentof said connections and acted on by said levers to separate the clutchelements from said double-faced member.`

5. In a clutch, in combination, a double- .faced member, voppositelydisposed clutch elements adapted to engage the faces of said member,pull rods connected to one of said elements, cam levers fulcrumed on theother of said elements and operable on said rods and by reaction on theelement upon which 'they are fulcrumed1 to move saidelements intoengagement with said double-faced member, thrust members carried by theclutch element to ywhich element the pull .rods are connected, saidthrust members being inthe path o movement of said levers when'moved torelease the clutch elements fromsaid double-faced member whereby theclutch `elements are positively separated.

6. In a clutch, in combination, adoubleaced member, a coupling member,clutch -elements surrounding said coupling member and adapted to'engagethe faces of said .double-faced'mem'ber, cam levers fulcrumed on one-ofsaid elements and having engage- .ment with the other element tomoveSaid elements into engagement with said doublefaced member and -torelease said engageone of said :elements and operable by said leverswhen releasing said engagement to positively separatethe clutchdouble-faced member.

elements from the x7. Ina clutch, in combination, an annulardduble-faced clutch member,a shaft, a coupling hub` ixed to the shaft,aclutch element adapted to coperate .with'one of the faces ofsaid memberand including a sleeve mounted to slide on said hub, a second clutchelement adapted to coperate with theother face of saidmember andincluding .a ,sleeve slidably mounted on said lirstnamed sleeve,pull-rods connected to said last-'named clutch element and passingbetweenseid sleeves and provided with heads on their outer ends, and camlevers mounted on said rst-namedclutch element adapted .to engage saidheads -to move said clutch leleements into engagementwith said mem- 1, Al -8. In a clutch, in combination, an annular double-faced member, ashaftv passing` through said member a coupling hub mounted lon the shaftand Within saidmember, a clutch element adapted to coperate with one ofthe faces of said member and including a sleeve slidably mounted on saidhub,

a second clutch element adapted to coperate with the other face of saidmember and including a sleeve slidably mounted on said first-namedsleeve, operating means for 'l .cause the clutch elements to releasesaid member.

9. In -a clutch, in combination, a shaft, an annular double-faced clutchmember surrounding the shaft, a coupling hub fixed to the shaft andarranged `within said member, annular clutch elements movable toward andaway from each other tobe engaged with and'disengaged from said member,means for operating said,` clutch elements, connections between saidlmeans and elements for moving the latter toward said member, and meansindependent of lsaid connections and operable by said means forpositively moving said elements out of engagement with said member.

l0. In a clutch, in combination, a shaft, an annular double-faced clutchmember, a coupling hub fixed to the shaft, a clutch element adapted tocoperate with one of the faces of said member and'including a sleeveslidably mounted on said hub, a second clutch element adapted tocoperate with the otherface of said member and including a sleeveslidably mounted on saidfirstnamed sleeve, pull rods' connected to saidlast-named clutch element and passing between said sleeves, clutchlevers mounted on said first-named clutch element and having connectionwith said pull rods for moving the clutch elements into engagement withsaid member, thrust rods connected to the same clutch element as saidpull rods and located in the path of movement of said levers wherebymovement of the levers in releasing engagement of the clutch elements ofthe' said member causes said thrust rods to be engaged by said levers topositively disengage said clutch elements from said member. l

ll. In a clutch, in combination, a shaft, an annular double-faced clutchmember, a coupling hub fixed to the shaft, a clutch element adapted tocoperate with one of the faces of .said member and including a sleeveslidably mounted on said hub, a second clutch element adapted tocoperate with the other face of said member and including a sleeveslidably mounted von said rst-named sleeve, pull rods connected to saidlast-named clutch element and passing between said sleeves, clutchlevers mounted on said first-named clutch element and having connectionwith said pull rods for movl ing the clutch elements intol engagementwith said member, lthrust rods connected to the same clutch element assaid pull rods and passing between said coupling hub and the first-namedclutchland having their free ends located in the path vof movement ofsaid levers vwhereby movement of the latter in releasing engagement ofthe clutch elements with the said member causes said thrust rods to beengaged-by said levers to positively disengage said Aclutch elementsfrom said member.

12. In a clutch, in combination, a double` faced member, clutch elementsadapted to vengage the faces' of said member, pull rods connected to oneof said elements, 4operating levers fulcrumed on the other of said ele-`ments andv having an adjustable connection with said pull rods andadapted, when moved-in one direction, to move said elements intoengagement with said member and, when moved in the opposite direction,to release said member, thrust rods connected to the same element assaid pull rods and arranged in the path of movement of saidl levers tobe engaged thereby when said levers are moved to release said member, topositively move said clutch elements out of engagement with said member.

13. In a clutch, in combination, a doublefaced member, clutch elementsadapted to engage the faces of said member, pull rods connected to oneof said elements, operating levers fulcrumed on the other of saidelements and having an adjustable connection with said pull rods andadapted, when moved in one direction, to move Said elements intoengagement with said member and, when moved in the opposite direction,to release said member, thrust rods connected to the same element assaid pull rods and arranged in the path of movement of said levers to beengaged thereby when said levers are moved torelease said member, topositively ymove said clutch elements out of engagement with saidmember, said thrust rods having an adjustable connection with.

said clutch element. 1

14. ln a clutch, in combination, a doublefaced member, a coupling hublocated within said member, clutch elements adapted to engage saiddouble-faced member, operating levers mounted on one of said elementsand having connection with the other element whereby said levers, whenmoved in one direction, move said elements into engagement with saidmember, and, when moved in the opposite direction, release said inember,thrust rods connected to the clutch element opposite to that carryingsaid levers, and ,thrust devices mounted on said hub, said thrust rodsand thrust vdevices being mounted in the path of movement of said leverswhen releasing said member whereby i i saidleversfengage,saidii'ods'anddevices to athrllS,tadevces--A mounted gon.said hub, said thrust rods ,and thrust devices bein mountedfinffthe:path 'ofmovement of said levers when releasing said. member wherebysaid levers rengagesaid rodsand' devices to positivelymovemthe;clutchelements out of engagementvv-th-said member, said thrust devices:comprising boltsfthreaded into said hub i; e g r l169,111', a clutch,nfombination, a doublefaced member, a coupling hub located Within b saidmember, clutch. elementsl adapted to. en-

gage @said double-facedJ member, operating levers mounted-infime of'Said elements and having connection, with 'the other elementwherebysaidalevermwhen'moved in one directiommove said p elements intoengagement Withaid member.an'd, Whenmoved in the opposite "directiom-,f,rel,es 1se,..,sail.,L ,A member, thrust .rods adjustabLY,` threaded -in-said clutch z element-connected gtothe clutch elementhopposite tothaticarrying said levers, and-thrust -devices mounted'. nni said-,-ghub,

i saidvthrnstzrods.and thrust'idevices being mounted infthe. 'path Tofmovement of said levers when .releasing said, member ,whereby saidleversfenga-ge said rods. and;x devices to A positivelyv move theelutchelements out of engagement twithfsaid nnember,A fand., means to preventrotation of said thrust rods and 17. I-n achats-eli, coinbinlation,` adoublefaced member, oppositely ,disposedgclutch A a elmentsadapted't'oengage the faces of said membm-s pull,devicesfconnected to one ofsaid-elementsvfcam means acting on said pull devices andthe other. 'ofsaid elements to movev saidfelements into engagement with thesaidmemberyand means independent of said pull=devices adapted to be operatedby saidacamfme'ans to positively disengage said elements tom'saidmember.

18a In a-clutch, ,incombination,` a shaft, A

an annularv'dbuble-'faced clutch-member surroundirgthe-shait, a couplinghub fixed to theisbbtand arranged Withinsaid member,

annillarfclutch elements movable toward and l away'iromeacheother-to bevengaged with and disengaged from said member, -said elements includingconcentric lsleeves slidably disposed about said hub, means 'for movingsaid clutch elements into engagement with said member, and `disengagingsaid elements from said member, and thrust devicesadapt-y ed to beengaged 'by' said means to positiveljT Vremove said elementsout ofengagementpwith the clutch member.

19. I`n a clutch, ilifcombinatiom'a doiiblefaced member, a. hub, clutchelements adapt-- ed to engage said double-faced member means carried by-one of said elementsand movable in one direction to engage saidelements4 with said member and in the other direction to relieve saidvelein'e'r'its 'from engagement with said member, thrust rods car# riedyby the clutch element opp'site'to that carrying said means, thrustdevices mi'inted n` said hub, said thrust rodsl land thrust devicesbeing vmounted int'he path of movement o'fsaid means whendisel'agaging`said elements 'from the said member'Whereby the said means engages saidrods and devices ,to rpositively`r move -the clutch elements out ofengagement with said member.4

20. In a clutch,in combination, a doublefaced member, oppositelydisposed clutch elements adapted to engage the faces'ot said gmemberhpull de'vices connected to one 'of said l elements, 'operating'means "acting on said lpull devices and the other of'said elementsto'move said elements into enga'el ment vvith said member, 'and me'ansiny'ependent ofssaid pull devices adapted to be operated bjffs'aidperatingrmeans to positivelyfdisengage vsaid"'elemel'itfs from saidmember.

ai. In 'a Gluten, 'in combineren; double'- Y faced member, oppositelydisposed clutch elements adapted to engage the faces of said members,pull devices connected to one of said elements, operating ,means acting'bn said pull devices and the other of said ele` ments to move saidelements intfe'ngage ment yWit-h said elements', and thrust `rods on theelements to twhich the said pull devices are connected 'and arranged'tobe act'e'd upon by'said operating means to positively disen'i gagesaidelements from Saidmernber. i .4

the sub'-A signed our names'in the scribing ivltnesses.v Q 'l y Fenna.KEMP.'

presence of EDWIN c. Rennen;

, Witnesses to the 'signature of `Fred A Kemp: i' s l l TmTir CARLSON, ACYRns Evans. e x. `Witnesses to the 'signature of EdWin'C. Reeder;

c. irWAasEs,

O. D. iaAvEn.

